The oilless compressors work just fine, but as others have said, they tend to be very loud. I was told by a technician who works on both at a dealer that sells both, but mostly oiled compressors that under normal conditions an oilless will have about one-tenth the lifespan of an oiled compressor. I frequently run my oiled compressor continuously for quite a long time, but you must not do that with an oilless or you'll shorten it's life even more. I tried using a 30 gallon horizontal Craftsman (by DeVilbiss) oilless in the mid-90s and had to rebuild it about every 6 to 8 months. The only good news is that parts are fairly cheap, it's easy to rebuild one, and I can do that in less than an hour; probably less than a half hour.:laughing:
I've told people in the past that there are two reasons for that nice housing or cover over the oilless. One is because if you could see what's under there you wouldn't buy it and two is for that housing to keep you from getting hurt when it tries to throw parts at you.:laughing: If you think they're loud when running normally, wait until you hear what they sound like with parts flying around inside and cracking that housing.:licking:
But for occasional use, and to never leave it running more than 10 minutes maximum, they aren't too bad.